Hello tanveerlangah1947,
According to the online FAQ (Samsung Galaxy Store Seller Portal), “The review process can take up to 2 - 5 business days, depending on the type of publication selected (automatically, on date, or manually). However, it may take longer if additional verification is required or if there are many applications waiting for review.”
So, it may be your app requires “additional verification.” This Seller Portal online help page explains what is being reviewed. You can review the criteria that your app must meet in the Self-Checklist (Galaxy), Intellectual Property Infringement Checklist, and Distribution Guide. You can ask the Seller Portal support team if there is specific criteria that your app is not meeting and if they need additional information to help with the verification process.